use tags i guess

.github/workflows/ghcr.yml

@@ -4,8 +4,8 @@ name: Create and publish a Docker image
 # Configures this workflow to run every time a change is pushed to the branch called `release`.
 on:
   push:
-    branches:
-      - release
+    tags:
+      - 'v*'
 
 # Defines two custom environment variables for the workflow. These are used for the Container registry domain, and a name for the Docker image that this workflow builds.
 env: